.sources-header, .sources-main, .sources-footer { width: min(100% - 64px, 1280px); margin-inline: auto; }
.sources-header { min-height: calc(80px + env(safe-area-inset-top)); padding-top: env(safe-area-inset-top); display: flex; align-items: center; justify-content: space-between; gap: 16px; border-bottom: 1px solid var(--line); }
.sources-header a { display: inline-flex; min-height: 44px; align-items: center; font-size: 13px; }
.sources-header .sources-brand { gap: 8px; font-size: 19px; font-weight: 700; letter-spacing: -.04em; }
.sources-brand span { color: var(--muted); font-size: 13px; font-weight: 400; letter-spacing: 0; }
.sources-main { padding-top: 56px; outline: none; }
.sources-intro h1 { margin: 0; font-size: clamp(32px, 4vw, 48px); line-height: 1.25; letter-spacing: -.055em; font-weight: 600; }
.sources-intro > p:not(.eyebrow) { color: var(--reading); font-size: 15px; line-height: 1.9; margin: 22px 0 0; }
.sources-intro .pilot-dates { color: var(--muted) !important; font-size: 12px !important; font-variant-numeric: tabular-nums; }
.baseline-card { margin-top: 32px; padding: 24px 28px; border: 1px solid #394834; border-radius: 12px; background: linear-gradient(145deg, #202820, var(--surface)); display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.baseline-card .eyebrow { margin: 0 0 8px; }
.baseline-card h2 { margin: 0; font-size: 21px; font-weight: 600; }
.baseline-card p:last-child { color: var(--muted); font-size: 13px; line-height: 1.8; margin: 8px 0 0; }
.baseline-card > a { display: inline-flex; align-items: center; gap: 16px; min-height: 44px; color: var(--accent); font-size: 13px; white-space: nowrap; }
.comparison-note { max-width: 900px; margin: 24px 0; font-size: 13px; line-height: 1.85; color: var(--muted); }
.comparison-note p { margin: 8px 0; }
.comparison-note strong { font-weight: 500; color: var(--reading); }
.sources-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 28px 0 20px; }
.sources-nav a { display: flex; align-items: center; min-height: 44px; padding: 0 14px; border: 1px solid var(--line); border-radius: 6px; font-size: 12px; color: var(--reading); }
.sources-nav a:hover { background: var(--hover); }
.sources-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; align-items: start; }
.source-column { min-width: 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; scroll-margin-top: 20px; }
.source-heading { padding: 24px 20px 18px; background: var(--surface); }
.source-status { color: var(--muted); font-size: 11px; margin: 0 0 10px; }
.source-status.ok { color: var(--accent); }
.source-status.error { color: #ecc3a4; }
.source-heading h2 { font-size: 22px; letter-spacing: -.025em; line-height: 1.45; margin: 0; }
.source-heading h2 a { display: inline-flex; align-items: center; min-height: 44px; }
.source-heading h2 a:hover, .source-item h3 a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.source-unit, .collection-meta { font-size: 11px; line-height: 1.9; color: var(--muted); margin: 8px 0 0; }
.source-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 4px; margin: 20px 0; }
.source-stats dt { font-size: 10px; color: var(--muted); line-height: 1.6; }
.source-stats dd { font-variant-numeric: tabular-nums; font-size: 26px; line-height: 1.5; margin: 4px 0 0; }
.source-error { color: #ecc3a4; font-size: 12px; line-height: 1.8; padding-top: 12px; border-top: 1px solid var(--line); margin: 12px 0 0; overflow-wrap: anywhere; }
.source-items { margin: 0; padding: 0; list-style: none; }
.source-item, .source-empty { padding: 22px 20px; border-top: 1px solid var(--line); }
.item-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; color: var(--muted); font-size: 10px; line-height: 1.7; }
.match-label { padding: 2px 7px; border-radius: 4px; background: var(--surface); }
.match-label.has-match { color: var(--accent); background: #222f22; }
.source-item h3 { font-size: 17px; line-height: 1.55; margin: 12px 0 0; font-weight: 600; letter-spacing: -.015em; word-break: normal; }
.source-item h3 a { display: block; padding-block: 2px; }
.source-excerpt { margin: 12px 0 0; color: var(--reading); font-size: 14px; line-height: 1.8; word-break: normal; }
.translation-pending { color: var(--muted); font-size: 10px; }
.original-copy { margin-top: 12px; font-size: 11px; color: var(--muted); }
.original-copy > summary { cursor: pointer; min-height: 44px; padding-block: 12px; }
.original-copy .original-title { margin: 6px 0 0; font-size: 13px; line-height: 1.7; color: var(--reading); word-break: normal; }
.original-copy .source-excerpt { font-size: 12px; color: var(--muted); margin-top: 8px; }
.source-day-hint { margin: 0; padding: 16px 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; line-height: 1.8; }
.source-day { border-top: 1px solid var(--line); }
.source-day > summary { display: flex; align-items: center; gap: 10px; min-height: 58px; padding: 14px 20px; cursor: pointer; background: var(--surface); font-size: 13px; font-variant-numeric: tabular-nums; list-style: none; }
.source-day > summary::-webkit-details-marker { display: none; }
.source-day > summary::before { content: '▸'; color: var(--accent); }
.source-day[open] > summary::before { content: '▾'; }
.source-day-count { margin-left: auto; color: var(--muted); font-size: 11px; }
.matched-links { margin-top: 12px; font-size: 11px; color: var(--muted); }
.matched-links summary { cursor: pointer; min-height: 44px; padding-block: 12px; }
.matched-links ul { margin: 0; padding: 0 0 0 18px; }
.matched-links a { display: block; padding: 8px 0; line-height: 1.7; overflow-wrap: anywhere; color: var(--accent); }
.issue-reference { display: inline-flex; align-items: center; min-height: 44px; font-size: 11px; color: var(--accent); }
.source-empty { color: var(--muted); font-size: 13px; line-height: 1.9; }
.sources-footer { margin-top: 48px; padding: 24px 0 40px; border-top: 1px solid var(--line); font-size: 11px; color: var(--muted); line-height: 1.8; }
@media (min-width: 901px) and (max-width: 1200px) {
  .sources-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .sources-grid { grid-template-columns: 1fr; gap: 24px; }
  .source-items { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .source-item:nth-child(even) { border-left: 1px solid var(--line); }
}
@media (max-width: 560px) {
  .sources-header, .sources-main, .sources-footer { width: calc(100% - 40px); }
  .sources-header { min-height: calc(64px + env(safe-area-inset-top)); }
  .sources-header .sources-brand { font-size: 17px; }
  .sources-brand span { font-size: 11px; }
  .sources-header > a:last-child { font-size: 11px; }
  .sources-main { padding-top: 36px; }
  .sources-intro > p:not(.eyebrow) { font-size: 14px; }
  .desktop-break { display: none; }
  .baseline-card { padding: 20px; align-items: flex-start; flex-direction: column; gap: 8px; }
  .source-items { display: block; }
  .source-item:nth-child(even) { border-left: 0; }
  .sources-nav { gap: 6px; }
  .sources-nav a { padding-inline: 10px; font-size: 11px; }
}